Try elbow grease it really works...... Also good for cleaning oily parts as well.
https://www.ebay.co.uk/itm/Elbow-Grease-All-Purpose-Degreaser-500ml-Trigger-Bathroom-Kitchen-Solvent-Free/153306520394?epid=1781299855&hash=item23b1c7db4a:g:qBwAAOSwkHxb9CgL:rk:2:pf:0
Dont buy off Ebay, you can get it in local shops for about £1. This is a real product and not a joke Just a great product.
Tony.